Refactor and enhance UI components

- Updated `CableInfoWidget` to include a TODO comment regarding manufacturer verification.
- Refactored `CustomTab` and `CustomTabWidget` to remove notification label functionality, simplifying the class structure.
- Improved `DeviceInfoWidget` by adding a destructor to manage graphics view memory and initializing graphics scene properly.
- Introduced `DiskUsageBar` and `DiskUsageWidget` classes to manage disk usage visualization, including hover popover functionality for detailed information.
- Enhanced `MediaPreviewDialog` to include more descriptive window titles and adjusted status label styling based on platform.
- Added platform-specific functionality in `macos.h` and `macos.mm` for popover management.
- Cleaned up `ToolboxWidget` by adjusting label styles and removing fixed sizes for better responsiveness.

src/diskusagewidget.h

@@ -1,7 +1,12 @@
 #ifndef DISKUSAGEWIDGET_H
 #define DISKUSAGEWIDGET_H
+#include "diskusagebar.h"
 #include "iDescriptor.h"
 
+#include <QHBoxLayout>
+#include <QLabel>
+#include <QProgressBar>
+#include <QVBoxLayout>
 #include <QWidget>
 #include <cstdint>
 
@@ -18,6 +23,8 @@ protected:
 
 private:
     void fetchData();
+    void setupUI();
+    void updateUI();
 
     enum State { Loading, Ready, Error };
 
@@ -25,6 +32,33 @@ private:
     State m_state;
     QString m_errorMessage;
 
+    // UI widgets
+    QVBoxLayout *m_mainLayout;
+    QLabel *m_titleLabel;
+    QLabel *m_statusLabel;
+    QWidget *m_diskBarContainer;
+    QHBoxLayout *m_diskBarLayout;
+#ifdef Q_OS_MAC
+    DiskUsageBar *m_systemBar;
+    DiskUsageBar *m_appsBar;
+    DiskUsageBar *m_mediaBar;
+    DiskUsageBar *m_othersBar;
+    DiskUsageBar *m_freeBar;
+#else
+    QWidget *m_systemBar;
+    QWidget *m_appsBar;
+    QWidget *m_mediaBar;
+    QWidget *m_othersBar;
+    QWidget *m_freeBar;
+#endif
+
+    QHBoxLayout *m_legendLayout;
+    QLabel *m_systemLabel;
+    QLabel *m_appsLabel;
+    QLabel *m_mediaLabel;
+    QLabel *m_othersLabel;
+    QLabel *m_freeLabel;
+
     uint64_t m_totalCapacity;
     uint64_t m_systemUsage;
     uint64_t m_appsUsage;